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Search Results: 1 - 10 of 1245 matches for " Parveen Jamal "
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Screening of Aspergillus for Citric Acid Production from Palm Oil Mill Effluent
Parveen Jamal,Md. Zahangir Alam,M. Ramlan,M. Salleh
Biotechnology , 2005,
Abstract: In this study, screening of potential microbes, especially Aspergillus, for citric acid production from Palm Oil Mill Effluent (POME) is carried out to improve the product yield. The fermentation of the raw material POME for the production of citric acid was conducted by the liquid state fermentation process. A total of ten strains of Aspergillus were selected for the screening test of which six strains were isolated from Sewage Treatment Plant Sludge (STP Sludge), purified and identified up to genus level and four strains of Aspergillus were from lab stock. All strains were screened under controlled fermentation conditions such as pH range of 2-3, temperature 30 C and agitation 150 rpm, using 1% (w/w) of substrate (POME), 2% (w/w) co-substrate (wheat flour) with inoculum size of 2% (106 spore mL 1). These strains were examined in terms of maximum citric acid production, biosolid production (TSS%) and Chemical Oxygen Demand (COD) removal. The strain Aspergillus (A103) produced the highest concentration of citric acid (0.28 g L 1), TSS (12.7 g L 1) and COD removal (72%) followed by A1020, A-SS106 and others on 2-4 days of fermentation.
Isolation of GSH from Baker Yeast by Ultrasonic Method
Mohamad Ramlan Bin Mohamed Salleh,Parveen Jamal,Rohani Binti Salleh,Haslinda Binti Hasim
Pakistan Journal of Biological Sciences , 2004,
Abstract: The purpose of this study was to determine the effect of operating parameters such as the yeast concentration, processing temperature and isolation time on the isolation of GSH using Ultrasonic method. The disrupted cells solution was centrifuged at 12,000 rpm for 20 min and the GSH content in the supernatant was analyzed by taking the OD value of the solution using Spectrophotometer at 412 nm. To study the effect of yeast concentration, yeast solution with the concentration of 3, 6, 9 and 12 wt.% was disrupted at their original temperature for 15 sec. The result shows that the optimum value of yeast concentration is 6 wt.% where 12.93 μmol mL-1 GSH was isolated. To study the effect of processing temperature, Ultrasonic process of the 6 wt.% yeast solution was done at various values of temperature such as 19, 22, 25, 28, 30 and 40 C for 15 sec. The results indicated that, the optimum GSH isolation temperature is 22 C with the isolation of 13.53 μmol mL-1 GSH. Then, to study the effect of isolation time, the Ultrasonic process of sample with the concentration of 6 wt.% was done at 22 C for 15, 30, 45 and 60 sec. The result indicated that the optimum isolation time for the Ultrasonic process is 15 sec.
Structures and Hydrogen Bonding Recognition of Mefenamic Acid Form I Crystals in Mefenamic Acid/ Ethanol Solution
Siti Kholijah Abdul Mudalip,Mohd. Rushdi Abu Bakar,Fatmawati Adam,Parveen Jamal
International Journal of Chemical Engineering and Applications , 2013, DOI: 10.7763/ijcea.2013.v4.277
Abstract: Mefenamic acid is one of the active pharmaceutical ingredientsthat exhibit polymorphism. An experimental study has found that Form I of mefenamic acid is produced fromcooling crystallization with ethanol as a solvent. Hydrogen bonding is considered as the fundamental factor that controls the polymorphism of mefenamic acid in ethanol. This work, in essence, was performed to verify this using molecular dynamics simulation.The simulation was performed using COMPASS force field available in Material Studio package.The resultof the simulation showed strong hydrogen bonding between oxygen and hydrogen in the carboxylic group.The results of the Fourier transform infrared spectroscopy analysis confirmed the existence of O-H, C-O and C=O bonds. These findings proved the presence of hydrogen bondsthat leads to the formation of hydrogen motif in Form I of mefenamic acid during crystallization process using ethanol as a solvent.
The Influence of Process Parameters on Lactic Acid Fermentation in Laboratory Scale Fermenter
Maizirwan Mel,Mohd Ismail Abdul Karim,Parveen Jamal,Mohamad Ramlan Mohamed Salleh
Journal of Applied Sciences , 2006,
Abstract: The purpose of this study was to study the influence of process parameters on the Lactic Acid Fermentation by Lactobacillus rhamnosus in laboratory scale fermenter. The experiment was designed by Taguchi Method using STATISTICA software. Three parameters have been chosen as the main parameters that affect significantly to the growth of L. rhamnosus; the agitation speed of the impeller, dissolve oxygen level (pO2) and pH. The most influence and important parameter for the fermentation process is pH at acidic value of 6, followed by stirrer speed (rpm) and pO2 even pO2 supplied and rpm played similar function in maintaining suitable dissolved oxygen to the cells.
Effect of Operational Parameters on Solid State Fermentation of Cassava Peel to an Enriched Animal Feed
Parveen Jamal,Ruqayyah I.D. Tijani,Md. Zahangir Alam,Md. Elwathig S. Mirghani
Journal of Applied Sciences , 2012,
Abstract: Response surface methodology based on the Face-Centered Central Composite Design (FCCCD) was employed to determine the effects of process conditions on the production of an enriched animal feed from cassava peel by a locally isolated white rot fungus Panus tigrinus (M609RQY). Seventeen experimental runs based on three parameters (pH, inoculum size and moisture content) as designated by FCCD were carried out under solid state fermentation. The effect of these parameters on lignin degradation in cassava peel was evaluated. Statistical analysis of the results showed that, only moisture content exerted a highly significant effect (p<0.01) on lignin degradation. The optimum parameter combination was found at 70% v/w of moisture content, 6% v/w inoculum size and pH of 5.30. Under this optimum, 50.62% lignin loss was obtained. This study presents a viable option to the management of cassava peel for production of value-added-product animal feed.
Comparison Studies among the Methods Used in Isolating the GSH from Baker Yeast
Mohamad Ramlan Bin Mohamed Salleh,Abd. Elaziem Farouk,Parveen Jamal,Yumi Zuhanis Has-Yun. Binti Hashim
Journal of Applied Sciences , 2005,
Abstract: The purpose of this study was to make a comparison among the methods used in isolating the GSH from baker yeast. This was done by comparing the optimum values of operating parameters such as the yeast concentration, processing temperature and the isolation time of each of the isolation methods used (Autolysis, Ultrasonic and Homogenizer). Among the three methods, Autolysis method produced the highest GSH concentration of 49.263 μmol mL-1 (15.14 g L-1) followed by Homogenizer method (18.33 μmol mL-1 or 5.63 g L-1) which is slightly higher than that of the Ultrasonic method (18.13 μmol mL-1 or 5.57 g L-1). The different occurred probably due to the different of the isolation time applied to the three methods. The same duration time couldn`t be used because it will increase the temperature of the sample higher that the optimum temperature of some of the methods. Unlike Ultrasonic and Homogenizer methods, the temperature for Autolysis method could be maintained within 1 h while for Homogenizer and Ultrasonic methods the temperature could only be maintained within 30 and 15 sec, respectively. The step down arrangement from best to worst for lab scale production was Autolysis>Homogenizer>Ultrasonic method. Autolysis was the best but the isolation time is longer compared to the other so that in large scale production, Homogenizer seems to be the best method due to the economical perspective. Ultrasonic is also can be considered as an excellent method but expensive compared to others.
Identifying Reading Preferences of Secondary School Students  [PDF]
Irshad Hussain, Parveen Munshi
Creative Education (CE) , 2011, DOI: 10.4236/ce.2011.25062
Abstract: The present study was conducted with the main purpose of identifying reading preferences of secondary school students and their related issues. The study was conducted on a total of 387 secondary school students of academic session 2010-12 in District Bahawalpur of Pakistan. Qualitative and quantitative data were collected through questionnaire and interview schedule respectively by adopting survey method. The study concluded that secondary school students preferred to read books, magazines, poetry and other reading materials to get pleasure through edutainment, kill their leisure time during holidays and/ or at weekends and for their emotional gratification. The respondents preferred to read books on religion, literature, novels, magazines and story & romantic books. They were keen on reading newspaper, traveling story and scientific books, autobiographies and literature –poetry and drama. They faced problems in reading and setting their reading preferences like high costs of the books, context and circumstances, availability of books, time and their time management ability, examinations & academic workload, lack of guidance, personal interest, and their study circles or groups.
Integrated Approach of Universal Soil Loss Equation (USLE) and Geographical Information System (GIS) for Soil Loss Risk Assessment in Upper South Koel Basin, Jharkhand  [PDF]
Reshma Parveen, Uday Kumar
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.46061
Abstract: Soil erosion is a growing problem especially in areas of agricultural activity where soil erosion not only leads to decreased agricultural productivity but also reduces water availability. Universal Soil Loss Equation (USLE) is the most popular empirically based model used globally for erosion prediction and control. Remote sensing and GIS techniques have become valuable tools specially when assessing erosion at larger scales due to the amount of data needed and the greater area coverage. The present study area is a part of Chotanagpur plateau with undulating topography, with a very high risk of soil erosion. In the present study an attempt has been made to assess the annual soil loss in Upper South Koel basin using Universal Soil Loss Equation (USLE) in GIS framework. Such information can be of immense help in identifying priority areas for implementation of erosion control measures. The soil erosion rate was determined as a function of land topography, soil texture, land use/land cover, rainfall erosivity, and crop management and practice in the watershed using the Universal Soil Loss Equation (for Indian conditions), remote sensing imagery, and GIS techniques. The rainfall erosivity R-factor of USLE was found as 546 MJ mm/ha/hr/yr and the soil erodibility K-factor varied from 0.23 - 0.37. Slopes in the catchment varied between 0% and 42% having LS factor values ranging from 0 - 21. The C factor was computed from NDVI (Normalized Difference Vegetative Index) values derived from Landsat-TM data. The P value was computed from existing cropping patterns in the catchment. The annual soil loss estimated in the watershed using USLE is 12.2 ton/ha/yr.


Effect of Special Finishes on the Functional Properties of Cotton Fabrics  [PDF]
Kawser Parveen Chowdhury
Journal of Textile Science and Technology (JTST) , 2018, DOI: 10.4236/jtst.2018.42003
Abstract: This study demonstrated that the changes in functional properties of both woven and knit cotton fabrics were determined to evaluate the performance of different special finishes. Here, 100% cotton fabrics were treated with different types of finishing chemicals at different formulations. To assess the performance of different finishes on fabric properties, GSM, bursting strength, tensile strength, dimensional stability, absorbency, crease recovery angle with ASTM and AATCC methods were done. The results showed that the functional properties of the finished cotton fabrics both woven and knit depend to a great extent on the type of finish.
Impact of Different Water Repellent Finishes on Cotton Double Jersey Fabrics  [PDF]
Kawser Parveen Chowdhury
Journal of Textile Science and Technology (JTST) , 2018, DOI: 10.4236/jtst.2018.43006
Abstract: This study demonstrated that the variation in physical and chemical performance on cotton double jersey knit fabrics was decided by the knit structure, water repellent chemicals types and their concentration. Here, two types of double jersey fabrics were treated with different types of water repellent chemicals at different formulations to evaluate the performance of water repellent finishes on knit fabrics properties. The levels of water repellency of the fabrics were assessed by AATCC 127 hydrostatic head test method and by ISO 4920:2012 spray rating test method. To evaluate the performance of water repellent finishes on knit fabric properties, GSM, bursting strength test according to ASTM (D 3786-87) method, air permeability, color fastness to wash, water, perspiration, chlorinated water and color fastness to rubbing with ISO method were done. The results showed that both physical and chemical properties of the finished cotton knits, depend to a great extent on knit structure, the water repellent finish type and concentration to obtain water repellent fabrics with desirable properties.
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